About the materials loss rate during the spoutbag making process

The materials loss of the earlier stage refers to the loss of the first to fourth layers of the spoutbag. This occurs during the printing and lamination processes. The materials structure of spoutbags can be categorized into three types: 2-layer, 3-layer, and 4-layer. Regardless of the type, all layers need to be printed and laminated. The materials loss of the earlier stage is associative in nature, with the materials of the previous layer being "jointly lost" by the subsequent layer. This includes not only the loss of materials, but also the loss of printing ink and solvent, as well as lamination glue and solvent.

On the other hand, the materials loss of the later stage occurs after the printing and lamination processes, when the spout bag has been almost "molded". At this point, the "joint loss" transforms into "overall loss". For example, in a material structure of "PET/PET/LLDPE", the materials loss would encompass all three layers.

In conclusion, the materials loss of packaging spout bag is a complex and multi-faceted issue, involving both the loss of materials and the loss of printing ink, solvent, and lamination glue. Understanding and addressing these losses is crucial for the efficient and sustainable production of spoutbag.